Magazine-back for cameras.



w F. FOLMER. MAGAZINE BACK EOR CAMERAS.

& m m m M 0 m m APPLICATION HLED DEC.I8.1913- Wit comm alwwa,

; pleee shifter and Pt clare WILLIAM F. FOLMER, OF ROCHESTER, NE

COMPANY, OF ROCHESTER, NEW YORK,

MAGAZINE-BACK W YORK, ASSIGNOR T0 EASTMAN KODAK A CORPORATION OF NEW YORK.

FOR CAMERAS.

1,255,868. Specification of Application filed December 1 To all whom it may concern:

Be it known that 1, WILLIAM F. FOLMER, of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Magazine- Baclts for Cameras; and I do hereby dethe following to be a full, clear, and e act d scription of the same, reference be ing had to the accompanying drawings, forming a part of this specification, and t0 the reference-nuznerals lntllliGCl thereon.

My present invention relates to photography and in particularly to photographiccameras, a C. it has for its object to provide came or magazine wherein a plurality oi plates are shifted one at a time from a storage chamber to an exposing chamber and successively exposed and to provide such back with simple mechanism for counting the plates when so shifted and exposed, and for iinlicating which plate is in position tor exposure. A further object of the inven o is to provide moans Where by the exposing mechanism is automatically locked when the last plate has been shifted and exposed. in order to bring this fact to the attention of the operator and to prevent an inadvertent second exposure of the last plate, it bein contemplated in the preferred f form or the invention that the exposing and.

shifting functions be embodied "in one elemeet and the ountiug and locking funetious 1 To these and other s in certain iintions of parts, all ore fully described, the nov m pointed out in the claims 1c. of the specification.

In the drawings:

Figure l is a rear elevation of a magazine back constructed in accordance with and illustrating one embed. sent of my invenas wi c; 2 is top plan View thereof; T F g. 3 is an end elevation showingthe duster slide in section on the line of Fig. l;

Fig. 4: is a horizontal section taken sil 'stantially on the line 4---l of Fig.

Fig. 5 is a vertical section taken substantially on the line 5 5 of Fig. 4;

Fig. 6 is a rear elevation showing the counting and locking mechanism detached;

Letters Patent.

Patented Feb. 12, 1918. a, 1913. Serial No. 807,468.

- Fig. 7 is a bottom mechanism, and

plan view of the same Figs. 8 and 9 are side views of said mechanisin with the parts in two difl'erent p0sitions incident to their operation.

Similar reference numerals throughout the several figures indicate the same parts.

In the present embodiment of the inventionthe magazine back. is shown as a detachable structure adapted to be applied over the hack of a camera, is usual, rather than being permanently fixed thereto as an integral part, and it coinprisesa casing 1 divided bye central partition 2 into a sup ply chamber 2 and an exposure chamber t.

Mounted to op rate in guides 5 at the front of the casing is a plate shifter and shutter slide 6 having a, back rib or operating portion 7 projecting from one end of the casing. A plurality of plates or of septunis containingfilm sheets, as the in the supply chamber 3. These are pressed forwardly against the shifter 6 by a suitable spring actuated tellerer 8 so that when the shifter pulled out the topmost plate Will be engaged by a, cam shoulder 9 and, with a subsequent inward movement of the shifter, will be transferred over the partition 2 into the chumber l where it is held against the guides 5 that define the focal plane by 'another spring actuated follower 10. The shoulders 9 normally occupy recesses 11 in the partition 2 and their ca; laces displace the platcsit in the supply c amber, tempt rarily, hen the shifter is withdrawn until they eng: he farther edge'of the topmost plate and when plate is already in the ex posure chamber 4 a. cam faced projection 12 temporarily displaces that plate as the advancing end of the shifter enters said chainher to make room for the new plate that follows in rear of the projection. After a plate has been shifted to the exposure chamheiylthe shifter 6, which also serves the function of a shutter slide, as will be seen, is drawn outwardly again during'the exposure of that plate and when it again covers, a new plate is on top or in a forward position and the exposed plate is thrust to the rear within the exposure chamber 4 and so on until all of the plates A in the storage chamher have been transferred to the exposure chamber, as shown at B, and exposed.

case may be, are placed The above description will. sutlice for the general construction of the magazine as devices operating along these general lines and of the same general nature are known to those skilled in the art.

In the practice of my present invention one of the end walls of the casing l adja- .cent to the guideways 5 in which the shifter 6 operates is recessed, as at 13, to accommodate the counter and locking mechanism about to he described, which i'nechanisin is carried by a mounting plate 1% secured to the exterior of said wall over the recess 13 and has an angularly disposed extension 15 secured to the top wall of the casing, which latter is also recessed (not shown in a suitable manner to accommodate such parts of the mechanism are mounted on theunderside of the extension.

These last moirtioned parts comprise a plunger on the extension at 1i and 18 and he d n inally pro ected by a spring to sin; an

extent that its fiangeo end 20 lies in the path of the back rib i, as shown more particularly in Figs. 1 and "3, and thus every time the shifter 6 is thrust inwardly to position a plate in the exposure chamber and to seal the latter the plunger 16 will be thrust inwardly also against the tension the spring 19 until the said rib or handle portion I on the shifter abuts against one or more rubber bumpers 21 on the casing wall, as shown in a Journaled in the plate i l a shat't 3 minating in a knob or handle on the ere terior and having fixed thereto on the in side of the plate a, counter wheel )i'O- vided on its under face with plurality oi numerals 2% successively vierable through an opening 25 in the plate as the wheel is turned (see Fig. 3). its many numerals are provided as there are plates in the supply chamber 3 when the latter is filled. There is also fixed to this shaft or to the Wheel 23 a ratchet 26, the teeth of which are adapted to be engaged and moved the distance of one tooth by a pawl "27 pivoted at 28 on an actuating lever 29 pivoted at 30 each time the said lever is vib'atcd. The lever is guided at 31 and its adjacent end is fitted with an angularly disposed arm 32 providing a cam surface 33 which is engaged by a cam surlace 3i on the plunger 16 when. the latter is thrust inwardly. This action operates the lever from the position of Fig. i; to that of Fig. 8. 1

Normally, or in the position of Fig.9, the lever 25) is held back by a spring arm and though the pawl 27 has a spring 36 that normally tends to move it into the path of the teeth on the ratchet 26, an arm 37 on the pawl, in the said position of the lever 29. engages pin 38 and holds the pawl out of such path. When the lever 29 is vibrated, however, this arm leaves the in and the pawl to engage the ratchet for a period sullicient to turn it the distance of one tooth at the completion of which movement another arm 39 on the pawl engages a stationary pin it) and throws the pawl out again, as shown in Fig. 8. Thus, in either position i the lever 29, the shifter 6 is in or out, the pawl 12? is out ot engagement and the wheel 23, together with the ratchet, is free to be reset the counter. Otherwise it would be necessary to withdraw the shifter 6 in order to reset the counter.

its before stated, the counter Wheel 23 tur s the distance of one tooth of theratchet 26 at every vibration otQthe lever 29 and eX- poses a new number through tlie'o'pening :25 and, therefore each inward thrust efthe shifter 6 and each, transfer oft a plate irom the 3 to the exposure'chainit c. soriug all rats et and insures a uniiorm :eot under each impulse and perot the munbers with the opencounter that the last plate has been exposed,

rei'oameu to he the into place upon the mt not closn plate and the plat t 1,. i ore, provide automatic means for lUCClil he shifter and shutter member (3 in e ""ion after it has been withdrawn t lose.

7051i (3 K- pose the last plate and cio means includes a bolt l9 gnu.

- 3 on the plate 14; and normally held. retracted bv a sgring si t mounted on the pin. ii hen projemcd, this sliding bolt cooperates with an opening &5 in the shifter or shutter 6 when the latter thrust in or in closed position, the opening being then in alinement with the bolts. The opening is preferably fitted with a hoe plate td, as shown in Figs. 1 and 4:.

The belt a2 is provided with an abutment a? in the path of a projection or abutment at?) on the counter wheel 33 or movable therewith. When the counter set zero this abutment 48 engages the belt at i (Fi 9) and in resetting, therefore, the counter may be turned back until stopped by this engagement. As each successive plate is there after shifted and registered, the abutment 45 moves around to the ri ht in 9 until by the time the last plate is thrust into posilion it is just above the abutment l? on the bolt. W hen the shifter and shutter member 6 is withdrawn to expose that plate no moand consequently whether turne l back to lever 29, but when the exposure is completed and the shutter member is thrust in again to terminate it, the impulse thereby givento the ratchet 26 and counter wheel 23 carries the bolt 42 into the opening 45 and locks the shutter against withdrawal until the counter is turned back in replenishing the slightly wider than the thickness of the operated thereby when the actuator is moved bolt and also the centering spring 41 for the ratchet 26 has a curved engaging face, as shown, and is so positioned that when the pawl 27 has given its full impulse to the ratchet, the latter is not turned the entire required distance but only to such a point that the centering spring 41 is poised on top of a tooth or just over the center there of whereby in riding down, the other side to occupy its position between two teeth, it gives the final impulse itself to carry the counter wheel the rest of the way. Thus, if when the actuator and pawl 27 have completed their effective movement in turning the abutment 48 on the counter wheel against the abutment 47' on the bolt the opening 45 is not quite opposite the end of the latter, the bolt will rest in yielding engagement with the keeper plate 46 or the face of the member 6 and will snap into en gaging position under the influence of the spring 41 when the opening docs finally reach the end of the bolt.

I claim as my invention:

1. The combination with a casing and an actuator extending through a wall there of, of a counter wheel mounted on said wall within the casing to turn in a plane at right angles to the actuator, a plunger movable parallel with the latter and adapted to be to one position and actuating connections between the plunger and counter wheel.

2. The combination with a casing and an actuator extending through a wall thereof, of a counter wheel mounted on said wall to turn in a plane at right angles to the actuator, a plunger movable para-llelgwith the latter and adapted to be operated thereby when the actuator is moved to one position and operating connections between the plungcr and counter wheel comprising a lever movable in a plane parallel to that of the wheel and, having a cam'faced engagement with the plunger", a ratchet on the wheel and a member on the lever cooperating with the ratchet.

\3. The combination with a casing and an actuator operating therein, of a counter,

means not normally in engagement therewith for operating the counter by the move ment of the actuator to one position, means for freeing the counter of its operating means at the conclusion of an operation and before the return of the actuator and independent m eans for resetting the counter.

4:. The combination with a casing and an. actuator operating therein, of a counter, a vibrating operating means therefor oper ated by the movement ofthe actuator to one position, a ratchet on the counter, a pawl on the operating means having a normal tendency to assume an engaging position with reference to the ratchet, means for holding the pawl out of engaging position when the operating means is at rest, means for moving the pawl to inoperative position at the conclusion of a stroke of the operating means and means for resetting the counter independently of the operating means.

5. The combination with a casing and an actuator operating therein, of a counter, a

vibrating operating means therefor operated by the movement of the actuator to one position, a spring for returning the operating means to normal position, a ratchet on the counter, a pawl on the operating means, a spring operating to move the pawl to an engaging position with reference to the ratchet, an abutment engaged by the pawl when the o iunating means is in normal pcsition to hold the pawl out of engaging position, a second abutment, an arm on the pawl engaging said abutment at the conclusion of an operation to withdraw the pawl from engaging position pending the return of the operating means and indepedent means for resetting the counter.

6. The combination with a casing and an actuator operating therein, of a counter movable in two directions, means not normally in engagement therewith for operating the counter by the movement of the actuator to one position, means for freeing the counter of its operating means at the conclusion of an operation and before the return of the actuator, a locking device for the latter actuated by the counter mechanism during a final counting movement thereof and indepedent means for resetting the counter and withdrawing the locking means.

7. The combination with a casing and an actuator operating therein, of a counter mechanism for registering the reciprocations of the actuator, means connected with the actuator for operating the counter through the medium of the actuator, and a locking device for the actuator adapted to directly engage it and to retain it in closed position 'and arranged to be positively actuated by the actuator through the medium of the counter mechanism after a predetermined number of movements thereof.

8. The combination with a casing. an actuator operating; therein, of a locking de vice for theactuator, means tending to move it to inoperative position, operating mechanism for the locking device including counter adapted to move the locking device to operative position after a predeteri'nined numebr of impulses have been given said operating mechanism, connections between the latter and the actuator for giving an impulse to the operating mechanism upon each operation of the actuator, and independent means for resetting the counter and. thereby releasing the locking device.

9. The combination with a casing and an actuator operating therein, oi a locking device for the actuator, operating mechanism for the locking device adapted to move the latter to operative position after a prede termined number of impulses have been given said operating mechanism and including a spring arranged to impart final movement to the locking device under the last such impulse, and connections between the operating mechanism and the actuator for giving an impulse to the operating mechanism upon each operation of the actuator.

10. The combination with a casing and an actuator operating therein, of a locking device for the actuator, a rotary element embodying a counter provided with an abut-- ment adapted to engage the locking device and actuate it to operative position when the rotary element has been turned a predetermined degree, means moved. by the actuator at each operation ereof for giving a partial rotation to the rotary member through a portion of such and means for resetting the counter, the locking device being adapted to act as stop for the counter upon such resetting movement 11. The combination with a casing and an actuator operating therein, of a sliding bolt adapted to engage and lock the actuator in closed position and provided with an abutment, a rotary element provided with an abutment adapted to engage that on the bolt and. to directly actuate the latter to operative position when the rotary element has been turned a. predetemined degree, a ratchet on the rotary element, a pawl adapted to engage the ratchet and give a partial rotation to the rotary member through a portion of such degree and connections causing the pawl be actuated by and upon each operation of the actuator.

12. The combination with a casing and an actuator operating therein, of a locking device for the actuator, operating n1echanism for the locking device embodying a counter adapted to move the locking device to operative position after a predetermined number of impulses have been given said operating mechanism, a spring for Withdrawing the locking device, connections bet- "een the operating mechanism and the actuator for giving an impulse to the operating mechanism upon each operation of the actuator, and a common means for resetting the counter and releasing the locking device through the medium of the counter in one operation LIAM F. FOLMER,

"Witnesses: 

